Join an association using the specified join-type, assigning an alias
to the joined association.
The joinType is expected to be one of CriteriaSpecification.INNER_JOIN (the default),
CriteriaSpecificationFULL_JOIN, or CriteriaSpecificationLEFT_JOIN.

throws:

HibernateException Indicates a problem creating the sub criteria

Parameters:

associationPath - A dot-seperated property path

alias - The alias to assign to the joined association (for later reference).